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What's the one thing you can do to your home to save the most energy?
home.howstuffworks.com/green-living/save-home-energy.htm
Saving home energy can be as easy as insulating your house's envelope. Learn more about ways you can save home energy through insulation.
M-48 General George S. Patton Medium Tank
science.howstuffworks.com/m-48-general-george-s-patton-medium-tank.htm
The M-48 General George S. Patton Medium Tank was developed in anticipation of the Cold War and used in the Korean War. Explore the M-48 Patton tank.
Centurion Main Battle Tank
science.howstuffworks.com/centurion-main-battle-tank.htm
The Centurion Main Battle Tank was heavily armed and used by many countries. Learn the history and design of Britain's Centurion Main Battle Tank.
Is the army testing an invisible tank?
science.howstuffworks.com/invisible-tank.htm
An invisible tank could give any military a distinctive edge on the battlefield. Find out how the British army is developing an invisible tank.
Why do you have two lungs but only one heart?
health.howstuffworks.com/human-body/systems/circulatory/two-lungs-one-heart.htm
The two lungs-one heart system evolved because that was all we needed to survive. Learn more about the evolution of the two lungs-one heart system.
What Is the Greenhouse Effect? Is It Inherently Bad?
science.howstuffworks.com/environmental/green-science/question746.htm
We'd be up a creek without Earth's atmosphere and the greenhouse effect it provides, but it turns out that an overactive greenhouse effect can result in a similarly devastating outcome.
Periungual Warts Overview
health.howstuffworks.com/skin-care/problems/medical/periungual-warts.htm
Periungual warts usually form around fingernails and toenails. Learn more about how periungual warts work at HowStuffWorks.
Pityriasis Rosea Overview
health.howstuffworks.com/skin-care/problems/medical/pityriasis-rosea.htm
Pityriasis rosea is a rash that occurs at almost any age. Learn about how pityriasis rosea works at HowStuffWorks.
Top 5 Ways to Prevent Dry Lips
health.howstuffworks.com/skin-care/lip-care/tips/5-ways-to-prevent-dry-lips.htm
There are many ways to prevent dry lips. Visit HowStuffWorks to see the top 5 ways to prevent dry lips.
How Flying Humvees Will Work
auto.howstuffworks.com/flying-humvee.htm
How will flying Humvees work? Read about the Pentagon's plans to make Humvees fly at HowStuffWorks.